Year Number 2004-01-01 6.177169363 2005-01-01 4.964910443 2006-01-01 5.086206897 2007-01-01 4.617280371 2008-01-01 3.155889008 2009-01-01 2.473945960 2010-01-01 3.317818976 2011-01-01 2.833923734 2012-01-01 3.790165574 2013-01-01 3.407558214 2014-01-01 81.401965860